diff --git a/.github/workflows/copyright-check.yml b/.github/workflows/copyright-check.yml
index eccfd470a56..5461e529253 100644
--- a/.github/workflows/copyright-check.yml
+++ b/.github/workflows/copyright-check.yml
@@ -21,6 +21,7 @@ jobs:
             -e py                   \
             -e gradle               \
             -e java                 \
+            -e kt                 \
             -e groovy               \
             -e sh                   \
             -e proto
diff --git a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/DackkaGenerationTask.kt b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/DackkaGenerationTask.kt
index a6a8559d02a..13d0cd2b1b0 100644
--- a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/DackkaGenerationTask.kt
+++ b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/DackkaGenerationTask.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.gradle.plugins
 
 import java.io.File
diff --git a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/DackkaPlugin.kt b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/DackkaPlugin.kt
index ddae25f96a3..e0745ccfeb7 100644
--- a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/DackkaPlugin.kt
+++ b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/DackkaPlugin.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.gradle.plugins
 
 import com.android.build.api.attributes.BuildTypeAttr
diff --git a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/FiresiteTransformTask.kt b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/FiresiteTransformTask.kt
index 4776fa0bfeb..0a7641c7583 100644
--- a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/FiresiteTransformTask.kt
+++ b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/FiresiteTransformTask.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.gradle.plugins
 
 import java.io.File
diff --git a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/GradleUtils.kt b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/GradleUtils.kt
index f5acde8f743..eb0dad74404 100644
--- a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/GradleUtils.kt
+++ b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/GradleUtils.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.gradle.plugins
 
 import java.io.File
diff --git a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/KotlinUtils.kt b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/KotlinUtils.kt
index 0830af21a91..0045afeef87 100644
--- a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/KotlinUtils.kt
+++ b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/KotlinUtils.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.gradle.plugins
 
 /** Replaces all matching substrings with an empty string (nothing) */
diff --git a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/ci/ChangedModulesTask.kt b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/ci/ChangedModulesTask.kt
index 4f6a053c020..11bf08075bd 100644
--- a/buildSrc/src/main/java/com/google/firebase/gradle/plugins/ci/ChangedModulesTask.kt
+++ b/buildSrc/src/main/java/com/google/firebase/gradle/plugins/ci/ChangedModulesTask.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.gradle.plugins.ci
 
 import com.google.gson.Gson
diff --git a/firebase-appdistribution/test-app/src/main/java/com/googletest/firebase/appdistribution/testapp/MainActivity.kt b/firebase-appdistribution/test-app/src/main/java/com/googletest/firebase/appdistribution/testapp/MainActivity.kt
index 8165362dacd..5d12271e194 100644
--- a/firebase-appdistribution/test-app/src/main/java/com/googletest/firebase/appdistribution/testapp/MainActivity.kt
+++ b/firebase-appdistribution/test-app/src/main/java/com/googletest/firebase/appdistribution/testapp/MainActivity.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.googletest.firebase.appdistribution.testapp
 
 import android.app.AlertDialog
diff --git a/firebase-appdistribution/test-app/src/main/java/com/googletest/firebase/appdistribution/testapp/SecondActivity.kt b/firebase-appdistribution/test-app/src/main/java/com/googletest/firebase/appdistribution/testapp/SecondActivity.kt
index 7ebc5968e0e..8af6529e3d5 100644
--- a/firebase-appdistribution/test-app/src/main/java/com/googletest/firebase/appdistribution/testapp/SecondActivity.kt
+++ b/firebase-appdistribution/test-app/src/main/java/com/googletest/firebase/appdistribution/testapp/SecondActivity.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.googletest.firebase.appdistribution.testapp
 
 import android.content.Intent
diff --git a/firebase-database/ktx/src/main/kotlin/com/google/firebase/database/ktx/ChildEvent.kt b/firebase-database/ktx/src/main/kotlin/com/google/firebase/database/ktx/ChildEvent.kt
index 2330b6a0476..95cb8e18ac2 100644
--- a/firebase-database/ktx/src/main/kotlin/com/google/firebase/database/ktx/ChildEvent.kt
+++ b/firebase-database/ktx/src/main/kotlin/com/google/firebase/database/ktx/ChildEvent.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.database.ktx
 
 import com.google.firebase.database.DataSnapshot
diff --git a/firebase-storage/ktx/src/main/kotlin/com/google/firebase/storage/ktx/TaskState.kt b/firebase-storage/ktx/src/main/kotlin/com/google/firebase/storage/ktx/TaskState.kt
index 4b4f32a67c4..e9a0f8590f6 100644
--- a/firebase-storage/ktx/src/main/kotlin/com/google/firebase/storage/ktx/TaskState.kt
+++ b/firebase-storage/ktx/src/main/kotlin/com/google/firebase/storage/ktx/TaskState.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.storage.ktx
 
 /** Used to emit events about the progress of storage tasks. */
diff --git a/tools/lint/src/main/kotlin/TasksMainThreadDetector.kt b/tools/lint/src/main/kotlin/TasksMainThreadDetector.kt
index e1b0aa11c2e..03810020798 100644
--- a/tools/lint/src/main/kotlin/TasksMainThreadDetector.kt
+++ b/tools/lint/src/main/kotlin/TasksMainThreadDetector.kt
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.lint.checks
 
 import com.android.tools.lint.detector.api.Category
@@ -61,8 +75,9 @@ class TasksMainThreadDetector : Detector(), SourceCodeScanner {
         briefDescription = "Use an explicit Executor for Task continuations",
         explanation =
           """
-                    Not providing an executor results in continuations to execute on the main thread \
-                    which is not a good default. Please pass in an executor explicitly.
+                    Not providing an executor results in continuations being executed on the main \
+                    thread, which in most cases is not intended. Please pass in an executor \
+                    explicitly.
                 """,
         category = Category.PERFORMANCE,
         priority = 6,
diff --git a/tools/lint/src/main/kotlin/ThreadPoolDetector.kt b/tools/lint/src/main/kotlin/ThreadPoolDetector.kt
index 3be937f886e..f72c0e7c449 100644
--- a/tools/lint/src/main/kotlin/ThreadPoolDetector.kt
+++ b/tools/lint/src/main/kotlin/ThreadPoolDetector.kt
@@ -1,3 +1,17 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.firebase.lint.checks
 
 import com.android.tools.lint.detector.api.Category